valutazioni - 2, GPA: 4
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Air Inflow Vents – Cool air enters here 5. Channel Controls – Channel control area 6. Signal LEDs – The lowest LED will begin to light when the output voltage reaches -18dBu below rated output. The Clip LEDs will begin to flash when output voltage is 1/2 volt below the output power supply voltage. 7. Bridge – This LED indicates that the channel pair is selected to BRIDGE mode from the back panel switch, and that only the odd input channel level control is active 8. Temp and Current LEDs – The Temp LED indicates that the amplifier has reached an excessively high operating temperature. The Current LED confirms that the amplifier output is delivered to a speaker load. 9. Channel Attenuators – These control the input signal level to the amp, and can be disabled from software. 10. Factory Reset – To reset all internal configurations (including passwords) back to their original factory settings, press and hold this recessed front panel tact switch during power up until all channel LEDs are lit. Upon reset completion, the LEDs will turn off and the amp will be in normal operating mode. Amplifier Rear Panel Amplifier Rear Panel 1. Optional Cobranet Card CNM-2 – Installation of this option allows this amplifier to be part of a Cobranet audio network. 2. Optional AES/EBU or MIC Input - This slot allows for installation of an AES/EBU digital input or MIC input. 3. Ethernet Port - This jack offers ethernet control and monitoring of basic amplifier functions using Proteane software. 4. Input Connector - This is used for a three wire (G, +, -) balanced input. Standard connectors are two-piece euroblock, with XLR connectors optional equipment. 5. Normal/Bridge Switch - This switches the channel pair to Bridge Mode 6. Euroblock Speaker Connectors - Used to connect the speakers 7. Remote Standby - These two contact closure pins are wired to a switch to remotely place the amp in standby. 8. Preset Recall - These four pins (and GND) can be wired to remote contact closure switches to recall up to four amplifier presets. 9. Data - These four pins can be wired to remote microprocessor based controllers such as the WR-5 or RD-8C. 10. Remote Level Control - These pins can be wired to remote potentiometers such as the WR-1 for level control of individual channels 11. AC Inlet - Used for the detachable AC cord. WARNING: Do not remove or lift the mains connector ground. Installation Before connecting to mains power, make sure that the switches and wiring are all set to the configuration needed for your particular application. Failure to do so could result in damage to the unit or other components in your system. CAUTION: When mounting or connecting the amplifier, always disconnect it from the mains. Use four screws and washers when mounting the amplifier to the front rack rails. Rear support is also recommended, especially for mobile or touring use. To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. Requirements NE-series multichannel amplifiers have specific physical, electrical and signal requirements for proper operation. These requirements will vary depending on your specific application, setup, and the settings on the amplifier. When setting up and testing your system, please take special care to double check all connections and settings. Please refer to the specifications section of this manual for specific input, output and other figures. Constant Voltage Models (25V, 70V, and 100V) and High Pass Filters The 25V, 70V, and 100V amplifiers include internal, factory installed High Pass Filter hardware. This allows for software selectable filters on each channel that prevent low frequency energy from saturating the core of low cost speaker tap transformers. Available settings are 80Hz (12dB/oct), 400Hz (6dB/oct), and OFF. The 400Hz setting is commonly used in paging systems with horn speakers. Note that with the HPF hardware installed, that amplifier can not have any of the optional AES/EBU input, MIC input, or DSP hardware. The DSP option can be factory installed in lieu of the HPF hardware, with HPF frequencies set in software to any value from 20Hz to 20kHz with a slope of 12dB/oct to 48dB/oct and various response options. In order to have AES/EBU capability in a constant voltage amplifier, the DSP option must be installed. 4. REMOTE AMPLIFIER CONTROL ON/OFF/Remote Standby The NE multichannel amplifiers have three possible states, OFF, ON, and STANDBY, each with a status LED on the front panel. Control for these three states is managed by the following: 1) Power Switch - When the power switch is turned off the amplifier is completely off, UNLESS the power switch has been disabled from within Proteane software, in which case the power switch on the amplifier has no effect at all. If the power switch has been disabled from software, the front panel DISABLE LED will be lit. Even if the AC power is removed, the amplifier’s internal memory will maintain the